Quote:
Originally Posted by Mike@N54Tuning.com
Sure, here is one with tps voltage added and scaled so that 2v = 1000. Boost targeting is a function of barometric pressure, IAT, and other factors. Getting targeting to work well under various conditions is tricky business. It may work well in the cold climate here, but when the ECU shifts around the boost targets for hotter weather be completely different. If you could include DME target and DME actual on your charts we could infer from the target curve your IAT and barometric pressure.
Mike
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I presume you are responding to me?
Thanks for the additional data as to throtte pedal position......this now explains that the procede throttle closure is consistent with boost being overtarget.
I too observed this behaviour on the early beta canbus maps. However, the more recent canbus maps seem to have improved on this as evidenced by my graph (admittedly not an extreme temperature test, but not what I would call cold weather either).
Curious.....there is no need for you to infer IAT as it is already showing on my logs at 36C for the JB3 and 34C for the procede - which is around 95F.
Ambient temps when I ran these logs were 78F for the Procede and 77F for the JB3 as shown in my filenames at the top of the spreadsheet.
Barometric pressure in the area was between 998-999 millibars.
But I know the point you are trying to illustrate....that throttle closure can be directly correlated to boost targets being exceeded, and those targets fluctuate with temperature extremes.